The five phases of the traditional SDLC (Software Development Life Cycle) are: 1. Planning: This phase involves defining project goals, scope, and requirements. It also includes identifying risks, constraints, and resources needed for the project. 2. Analysis: In this phase, the project team analyzes the requirements and develops a detailed plan for the software development process. This includes identifying functional and non-functional requirements, creating use cases and user stories, and developing a data model. 3. Design: The design phase involves creating a detailed technical design for the software. This includes designing the user interface, database schema, and software architecture. 4. Implementation: This phase involves writing code and integrating different components of the software. It also includes testing individual components and the software as a whole. 5. Maintenance: The maintenance phase involves ongoing support and maintenance of the software once it is deployed. This includes bug fixes, updates, and enhancements to keep the software running smoothly.